The Bunaeopsis genus only occurs in Africa and currently consists of approximately 27 species. This number might go down after a thorough revision. There probably are a number of synonymes among the described members. The moths are usually fairly large and colorful. Some (like jacksoni) are among the most attractive Emperor moths I know.
The rearing is still uncharted territory for many of them. Although there are plenty of records of Bunaeopsis feeding on grasses or grass like plants, one should consider other plants as well. Licharbas for exemple has been reared on Salix, while phidias clearly does better on Medicago. Whatever species you get, be advised that rearing them throughout winter months can be an extreme challenge, even for very experienced breeders.